Perhaps something like this shade cabana would give you the privacy you desire.

New, dual pane energy efficient windows is the way to go. Not only is it a sound barrier it will keep the heat/cold in. We replaced our windows..twice..now, I can't hear the phone ring when sitting on the patio and our heating/cooling bills have decreased significantly as well.

Hi. I'm not so great on these technicalities :-). I think the one in the picture uses wood, and placed vertically like that I think the slats would have much more strength than if they were flat. But I don't think even really hard woods would stand up to coconut pounding for long. Perhaps if you could find someone in your area that makes security gates like the one below, you would be able to source the slats they use through them (again, no doubt these slats are made from a variety of materials, you would have to find a tough kind).

I want to construct a new house in Srinagar Kashmir with facility of air conditioning (Hot in winter cold in summer) and modern bathrooms and Kitchen minimum 04 bed rooms sitting room patio etc Total covered should be 1200 to 1400sft.